Android UI SurfaceView的使用-绘制组合图型，并使其移动

绘制容器类：

//图形绘制容器
public class Contanier {private List<Contanier> list;private float x=0,y=0;public Contanier(){list=new ArrayList<Contanier>();}public void draw(Canvas canvas){canvas.save();canvas.translate(getX(), getY());childrenDraw(canvas);for(Contanier c : list){c.draw(canvas);}canvas.restore();}public void childrenDraw(Canvas canvas){}public void addChildren(Contanier child){list.add(child);}public void removeChildren(Contanier child){list.remove(child);}public float getX() {return x;}public void setX(float x) {this.x = x;}public float getY() {return y;}public void setY(float y) {this.y = y;}}

绘制正方型类：

//绘制正方型
public class Rect extends Contanier {private Paint paint;public Rect(){paint=new Paint();paint.setColor(Color.RED);}@Overridepublic void childrenDraw(Canvas canvas) {super.childrenDraw(canvas);canvas.drawRect(0, 0, 100, 100, paint);this.setY(getY()+1);}
}

绘制圆：

//绘制圆
public class Circle extends Contanier {private Paint paint;public Circle(){paint=new Paint();paint.setColor(Color.BLUE);}@Overridepublic void childrenDraw(Canvas canvas) {super.childrenDraw(canvas);canvas.drawCircle(50, 50, 50, paint);}
}

绘制类：

public class GameView extends SurfaceView implements Callback{private Contanier contaier;private Rect rect;private Circle circle;public GameView(Context context) {super(context);contaier=new Contanier();rect=new Rect();circle=new Circle();rect.addChildren(circle);contaier.addChildren(rect);getHolder().addCallback(this);}private void draw(){Canvas canvas=getHolder().lockCanvas();canvas.drawColor(Color.WHITE);contaier.draw(canvas);getHolder().unlockCanvasAndPost(canvas);}private Timer timer=null;private TimerTask task=null;//开始后让其根据Y轴进行移动private void startTimer(){timer=new Timer();task=new TimerTask() {@Overridepublic void run() {draw();}};timer.schedule(task, 100,100);}private void stopTimer(){if(timer!=null){timer.cancel();timer=null;}}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}@Overridepublic void surfaceCreated(SurfaceHolder holder) {startTimer();}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {stopTimer();}}

MainActivity:

   @Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(new GameView(this));}  

效果：